Trimming attachment for machines for sewing looped fabrics.



No. 724,016. PATBNTED MAR. 31, 1903:

G. KEYSER. I

TRIMMING ATTAQHMENT FOR MACHINES FOR SEWING LOOPED FABRICS.

APPLICATION FILED NOV. 1, 1398. no MODEL. v 2 SHEETS-SHEET 1.

m VENTOHI @7 W A TTOHNE).

THE NORRIS FEYERS m, momuma. wnsnmcnon, u. c.

. A PATENTED MAR.31,1903. A e. KEYSER.

TRIMMING ATTACHMENT FOR MACHINES FOR. SEWING LOOPED FABRICS.

APP'LIOATION FILED NOV. 1, 1898.

no MODEL. f 2 sHBBTssHnnT z.

II a .1 16 M m, W P J6 25 II I I lllll WITNESSES: INVENTOH A. I -V Z W W 11W 7 I A ATTORNEY.

UNITED STATES PATENT OFFICE.

GEORGE KEYSER, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO JOHN W HEPWORTH, OF PHILADELPHIA, PENNSYLVANIA.

TRlMMlNG ATTACHMENT TOR MACHINES FOR SEWlNG-LOOPED FABRICS.

SPECIFICATION forming part of Letters Patent No. 724,o1e, dated March 31, 1903.

Application filed November 1, 1898. Serial No. 695,224. (No model.)

To all whom it may concern:

Be it knownjthat I, GEORGE KEYSER, a citizen of the United States, residing in the city and county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Trimming Attachments for Machines for Sewing Looped Fabrics, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

This invention relates to that class of machines for uniting knit fabrics wherein sewing mechanism is combined with an intermittently rotatable circular series of radial points upon which the edges of the fabric to be united are impaled; and it has reference especially to a trimming attachment for such machines whereby the edges of the fabric are uniformly severed and the ravelings cleared therefrom preparatory to the sewing operation. I 1

The invention, asgenerally stated, comprises a novel construction and arrangement of presser device and actuating mechanism therefor whereby the fabric is maintained at the base of the impaling-points, a novel construction and arrangement of cutter Whereby a clean and uniform severance of the impaled edges is effected, a novel construction and arrangement of brush mechanism whereby the trimmings and ravelings are clearedv from the severed edges, a novel construction and arrangement of comb device wherebythe waste is cleared from the brush, and, finally, a novel construction and organizationof mechanism whereby the several moving members are controlled by a single rock shaft and whereby separate and independent adjustments of the respective parts may be readily had, all as will be hereinafter fully described and duly claimed.

In the drawings, Figure 1 is a plan of my improved trimming attachment as applied to a looping or turning-off machine. Fig. 2 is a sectional detail of the cutter-blades and adjuncts. Fig. 3 is a transverse section as on the line 00 a: of Fig. 1. Fig. 4. is a front elevation of the attachment. Fig. 5 is a transverse section as on the line y y of Fig. 1.

1 of the machine:

Fig. 6is a detail of the lower end of the presser, showing its operation on the impaled fabric.

1 designates a bed-plate, 2 a main shaft journaled in suitable bearings thereon, and-3 a fixed circular base sustained by an overhanging arm 4, extending from the bed-plate. On this base is supported the point-bearing annulus 5, which is intermittently rotated in the usual manner to advance the (impaled fabric point by point to the coacting needle 6 and looper 7 of the ordinary sewing mechanism. Upon the base forwardly of said mechanism is bolted or otherwise affixed a post or bracket 8, by which is adjustably supported an outwardly-extending arm 9. In the present instance the end of this arm is provided witha riblO, which is fitted toa vertical groove 11 in the bracket and held thereon by means of a horizontal set-screw 12, which extends through a vertical slot in the bracket. By this means the arm with its connections may be adjusted vertically and fixed in prefare simultaneously actuated. Affixed to this shaft is a rearwardly-extending crank-arm 15, to the free end of which is pivoted a block 16, that is in turn connected by means of a erally from an eccentric'18 on the main shaft,

; whereby the rock-shaft, with its connections, 7 is continuously actuated during the operation On the upper end of the rock-shaft is secured a forwardly-extending arm 19, to the free end of which is secured, preferably by a set-screw 20, a vertically-depending rod 21, the lower portion of which is arranged to swing upon or adjacent to the impaling-points during the operation of the rock-shaft in a manner to press the impaled edges of the fabric in close contact and against the base of the impaling-points preparatory to their advancement to the cutting mechanism. By manipulating the set-screw the rod may be released and adjusted vertically in respect to the points. The lower or acting portion of the rod is preferably flattened, as seen.

To the bracket-arm are afiixed a pair of suitably-located guide-arms 22 22, between which the edges of the fabric are directed as they approach the presser, and thereby maintained at the base of the points until the cutting mechanism has severed the edges of the fabric. One, 22, of these arms is disposed below and adjacent. to the impalingpoints, extending horizontally from the rock-shaft to and slightly in advance of the presser. The forward end of this arm is rounded, as indicated, while the rear end thereof is provided with a bend or extension, to which is affixed the lower end of a stem 23, depending from a lug or projection 24 on the outer extremity of the bracket-arm. The stem is held in the lug or projection by means of a set-screw 25, whereby it may be vertically and horizontally adjusted for the purpose of accurately fixing the guide-arm in respect to the points. The other guide-arm 22.is arranged adjacent to the arm 22, but above the basal ends of the points, the rearward end of the former arm being curved, as shown, so as to overhang the arm 22. Arm 22 is affixed to a stem 26, depending from and adjustably secured, by means of a set-screw 27, to a lug or projection 28 on the bracket-arm.

On the body of the bracket-arm intermediate the rock-shaft and the post is a vertically-bored boss 29, to which is fitted and secured a stem 30, the lower end whereof is provided with a shoulder 31, that takes against the lower end of the boss, while the upper end of the stem has centrally fitted thereto a screw 33, the head of which takes against a washer interposed between the same and the top of the boss.

Fixed on the lower end of the stem by means of a set-screw 32 is a forwardlyextending cutting-blade 33, the beveled edge of which lies adjacent to and transversely of the inner ends of the points and coacts with the corresponding edge of a similarly-extending blade 34:, likewise affixed to the lower end of the rock-shaft. Thus during the oscillations of the rock-shaft the edge of the blade thereon swings inwardly with a shearing action upon and across the edge of the fixed blade in a manner to sever the edges of the fabric above the row of impaled loops as rapidly as such edges are advanced between the blades. It will be observed that the active stroke of the blade 34 is in the direction of movement of the impaling-points and toward the base of the latter, thus obviating any liability of displacement of the impaled edges of the fabric and insuring a clean and uniform severance thereof.

Fitted to the block 16 above mentioned is a vertically-adjustable stem 35, which carries on its lower end a brush 36, that is designed during the reciprocation of the block to bear upon the impaled edges of the fabric and clear therefrom the waste and ravelings thereon remaining, so that clean even edges will be presented to the sewing mechanism.

As a simple and efficient means to clear the ravelings and waste lfrom the brush I arrange in the outward path of the latter a comb 37, which comprises in this instance a metallic strip 38, with a series of tip-projecting points or teeth on its upper edge, such strip being affixed to the horizontal rearward extension of a stem 39 depending from a boss 40 on the bracket-arm. The comb is vertically and horizontally adjustable in respect to the impaling-points in that the stem is affixed to the boss by means of a set-screw 41 or are concertedly operated from a common rock-shaft, and that the different members are separately and independently adjustable in respect to each other and to the impaling points to meet the varying requirements of service.

I claim as my invention- 1. In a machine of the class recited,the combination of the impaling-points and their support, a fixed bracket member, a rock-shaft carried by the said fixed bracket member, means for operating said rock-shaft, an arm carried by the rock-shat t and supported above and to one side of the impaling-pins, and a depending presser-rod carried by said arm and movable thereby longitudinally of and at one side of the impaling-pins.

2. In a machine of the class recited, the combination with the impaling points and theirsupport, of adepending presser-rod movable adjacent to and longitudinally of the points, a support, means for adjusting the presser-rod toward and from the sides of the points, and means for actuating said latter support.

3. In a machine of the class recited, the combination of the impaling-points and their support, a bracket adjacent said points, a rock-shaft journaled in said bracket and carrying an arm, a brush afiixed to the latter, and means for actuating said arm to move the brush longitudinally of the impaling-points.

4:. In a machine of the characterdescribed, the combination with the impaling-points and their supports, the brush and its supporting and operating parts, of a comb in the path of said brush, an arm by which said comb is sup ported, and a bracket from which said arms are adjust'ably supported,

5. The described attachment for a machine provided with impaling-points comprising a bracket or supporting member, a rock-shaft therein, guide bars arranged in diflferent planes to receive the impaling-points between them and connected with said bracket or supporting member, a presser-rod, an arm there for connected with the rock-shaft and from which the presser-rod projects, and means for actuating said shaft.

6. The described attachment comprising a bracket or supporting member, a rock-shaft therein, guide bars connected with said bracket or supporting member, a presser-rod adjacent said guide-bars, and an arm therefor connected with the rock-shaft, means for actuating said shaft, and two coacting cutter members one of which is affixed to the rockshaft and the other to the bracket or supporting member.

7. The described attachment comprising a suitable support, a rock-shaft therein, two arms affixed to said shaft, a presser on one of said arms, a pivotal block on the other arm, a brush connected with said block, and means for operating said block and through it the scribing witnesses.

GEORGE KEYSER. Witnesses WILLIAM H. ZELLERS, ANDREW V. GROUPE. 

